Saw sharpener



C. A. PHILLIPS ETAL July 2s, 1953 SAW SHARPENER 2 Sheets-Shea?l l FiledAug. 1, 195o I f-l l///////////////// miv /li TLF ma D f, [Pew i/ Aa .M .MM rm C ...MY @MEM m July 28, 1953 c. A. PHILLIPS ETAL Y 2,646,697

SAW SHARPENER 2 Sheets-Sheet 2 Filed Aug. l, 1950 INVENTORS Cala/.Eran A. P14/MP5 Hwm/,wumn A/vFa/PD Patented July 28, 1953 UNITED STATES PATENT OFFICE SAW SHARPENER Carleton A. Phillips, Corning, and William B. Sanford, Painted Post, N. Y.

Claims.

The present invention relates to saw sharpeners and has for its prime object the provision of an extremely simple device which may be readily employed in combination with the chassis of a conventional form of circular power saw to sharpen its circular saw and/ or to sharpen similar saws of a substantial range of diameters.

Another object is the provision of a device which has adjustable features enabling the grinding of the faces of the teeth of a circular saw squarely or on a bevel, as desired.

Another object is the provision of a device of the foregoing character wherein a pawl adapted to hold the saw against turning movement about its axis during the sharpening of a tooth thereof is carried by the saw support so that initial rotary and/or vertical adjustment of the saw with respect to the grinding disc does not require any alteration or adjustment of the pawl.

In the accompanying drawing Fig. 1 is a sectional front elevation of a conventional circular saw table showing a fragment of the arbor with the saw thereof replaced by a grinding disc. Shown in full is the usual miter having clamped thereto an assembly embodying the invention with a saw shown partly broken away mounted thereon.

Fig. 2 is a view taken on line 2-2 of Fig. l.

Referring to the drawings in detail, II represents the table of any conventional form of circular power saw, preferably of the tiltable table or tiltable arbor type, having the usual miter guide grooves I2 and I3 for receipt of the slide bar I0 of a miter 35, and having its arbor I4 equipped with a suitable grinding disc I5.

A device for holding a saw such as I6 to be sharpened includes a vertically disposed 'base plate I 'l secured at its bottom end to a transverse wood block I8 cut-away in the area below the bottom edge of the base plate. A saw holder is adjustably secured to plate I'I by means of clamping bolts 2| and 22. Bolt 2| passes through a perforation in the axial center of hub 23 of saw support 2|) and through a vertical slot 24 in plate I1. A bushing 26 of an outside diameter to t the hole of saw |6 is also arranged on bolt 2| and clamped fbetween hub 23 and a washer 29 by means of a wing nut 25. Saw I6 is snugly held against hub 23 by a coil spring 21 threaded over the bushing 26 and held compressed between the saw and washer 29. Bolt 22 passes through slot 24 and through an arcuate slot in saw holder` 20 concentric to the periphery of hub 23. Bolt 22, with its cooperative wing nut 28, provides a second means of clamping the plate and saw holder 20 to one another.

Forming an integral part of holder 20 is an arm 30 having hinged to its free end one end of a lever or spacing pawl bar 3|. The other end of bar 3| is provided with a pawl 32 adapted to enter the gullet between adjoining teeth of the saw. A helical spring 33 extends between the otherwise free end of bar 3| and pierced lug 34 projecting from the convex face of hub 23, and serves to resiliently maintain the pawl 32 in engagement with the saw, but enables movement of the bar to free the saw for turning movement about bushing 26.

Holder 20, with a saw such as I6 mounted thereon, is vertically adjusted to such position that teeth of the saw project into the space below the bottom edge of base plate I 1, after which the wing nuts 25 and 28 are tightened down to lock the holder 20 rigid with respect to plate I'l.

What is claimed is:

1. In combination, a vertically disposed plate having an elongated slot therethrough extending a substantial distance down from near the top margin of said plate, a vertically disposed saw support arranged adjacent said plate having a perforation therethrough and also having an arcuate slot therethrough extending about a center passing through said perforation, a bolt passing through said elongated slot and said perforation, a second bolt passing through said r the same, means passing through said slots for Aalong said longitudinal slot, means for resiliently holding the saw against said support, and readily displacable means for locking the saw against turning relative to said support.

3. The combination with a circular saw chassis assembly including a table With a miter groove therein, an adjustable angle miter slidable along such groove and a rotatable saw blade mandrel, of a grinding disc carried on the mandrel, and a support in xed relation to the miter adapted to hold aciroular saW blade thereon with a tooth thereof in a position to be passively engaged by such disc by movement of the miter along-bits groove said adjustable miter comprising means whereby the angular position of the saw` can be attained with respect to that of the ldisc so that any desired beveling of a saw tooth .can` be effected by such disc. y

4. A Work support consistingof an upstandin generally rectangular plate having a longitudinal slot extending therethrough lengthwise of the e@height"thereof, a-oircular sawrsupport having an aperture therethrough, an extension beyond the -fport, asboltl-passing through said slot and said J1fzaperture.adapted-. to clamp. said support and plate-to.one *anotherf means including said bolt -mforfalso clamping a-fcircular saw blade through f whose-.eye said bolt hasbeen passed to said support, andrmeans on the free end of said arm for `vengaging a gullet of. such` saw undervtension of said spring.

5. In saw sharpening apparatus, a mandrel arranged in a horizontal plane, a support for said mandrel having a grooved-top table thereover with a slot therein, a grinding Wheel mounted on said mandrel projecting through said slot in a plane parallel to such groove, an element slidable along a path afforded by said groove, a miter vertically pivoted to said element Whereby the angular relation of-said-miter with respect to the grindingvvheel and such groove can be modied, and a support fixed to said miter for `holding a circular saw to be sharpened in a position to engage its teeth with said grinding wheel by'movement of said miter and element along the element groove and in a manner dependent 'llonthefadjusted angular position of said miter.

CARLETON A. PHILLIPS. WILLIAM B. SANFORD.

References Cited in the le of this patent UNITED STATES PATENTS 

